A comparative study of electrochemical methods on Pt-Ru DMFC anode catalysts: The effect of Ru addition

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dc.contributor.authorSahin, Ozlem
dc.contributor.authorKivrak, Hilal
dc.date.accessioned2020-03-26T18:40:58Z
dc.date.available2020-03-26T18:40:58Z
dc.date.issued2013
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractIn the present study comparative electrochemical study of methanol electro-oxidation reaction, the effect of ruthenium addition and experimental parameters on methanol electro-oxidation reaction at high performance carbon supported Pt and Pt-Ru catalysts have been studied by cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) in H2SO4 (0.05-2.00 M) + CH3OH (0.01-4.00 M) at 20-70 degrees C. Tafel plots for the methanol oxidation reaction on Pt and Pt-Ru catalysts show reasonably well-defined linear region with the slopes of 128-174 mV dec(-1)(alpha = 0.34-0.46). The activation energies from Arrhenius plots have been found as 39.06-50.65 kJ mol(-1). As a result, methanol oxidation is enhanced by the addition of ruthenium. Furthermore, Pt-Ru (25:1) catalyst shows best electro-catalytic activity, higher resistance to CO, and better long term stability compared to Pt-Ru (3:1), Pt-Ru (1:1), and Pt. Finally, the EIS measurements on Pt-Ru (25:1) catalyst reveals that methanol electro-oxidation reaction consists of two process: methanol dehydrogenation step at low potentials (<700 mV) and the oxidation removal of COads by OHads at higher potentials (>700 mV). Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.en_US
dc.description.sponsorshipSelcuk UniversitySelcuk University [S.U. 11401131]en_US
dc.description.sponsorshipAuthors would like to thank the administrative units of the scientific research projects of Selcuk University for the financial support (project no: S.U. 11401131).en_US
dc.identifier.doi10.1016/j.ijhydene.2012.10.066en_US
dc.identifier.endpage909en_US
dc.identifier.issn0360-3199en_US
dc.identifier.issn1879-3487en_US
dc.identifier.issue2en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage901en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.ijhydene.2012.10.066
dc.identifier.urihttps://hdl.handle.net/20.500.12395/29136
dc.identifier.volume38en_US
dc.identifier.wosWOS:000315001700019en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherPERGAMON-ELSEVIER SCIENCE LTDen_US
dc.relation.ispartofINTERNATIONAL JOURNAL OF HYDROGEN ENERGYen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectMethanol electro-oxidation catalysisen_US
dc.subjectPlatinum ruthenium anode catalysten_US
dc.subjectDirect methanol fuel cellsen_US
dc.subjectElectrochemical impedance spectroscopyen_US
dc.titleA comparative study of electrochemical methods on Pt-Ru DMFC anode catalysts: The effect of Ru additionen_US
dc.typeArticleen_US

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